from random import Random  # 用于生成随机码
from django.core.mail import send_mail  # 发送邮件模块
from APP.current.models import EmailVerifyRecord  # 邮箱验证model
from django.conf import settings    # setting.py添加的的配置信息

import datetime


# 生成随机字符串
def random_str(randomlength=8):
    """
    随机字符串
    :param randomlength: 字符串长度
    :return: String 类型字符串
    """
    str = ''
    chars = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz0123456789'
    length = len(chars) - 1
    random = Random()
    for i in range(randomlength):
        str += chars[random.randint(0, length)]
    return str


# 发送电子邮件
def send_code_email(email, send_type="register"):
    """
    发送电子邮件
    :param email: 要发送的邮箱
    :param send_type: 邮箱类型
    :return: True/False
    """
    email_record = EmailVerifyRecord()
    # 将给用户发的信息保存在数据库中
    code = random_str(16)
    email_record.code = code
    email_record.email = email
    email_record.send_type = send_type
    email_record.send_time = datetime.datetime.now()
    email_record.save()
    # 初始化为空
    email_title = ""
    email_body = ""
    # 如果为注册类型
    if send_type == "register":
        email_title = "注册激活"
        # email_body = "请点击下面的链接激活你的账号:http://127.0.0.1:8000/active/{0}".format(code)
        email_body = "您的邮箱注册验证码为：{0}, 该验证码有效时间为两分钟，请及时进行验证。".format(code)
        # 发送邮件
        send_status = send_mail(email_title, email_body, settings.EMAIL_FROM, [email])
        if not send_status:
            return False
    if send_type == "retrieve":
        email_title = "找回密码"
        email_body = "您的邮箱注册验证码为：{0}, 该验证码有效时间为两分钟，请及时进行验证。".format(code)
        # 发送邮件
        send_status = send_mail(email_title, email_body, settings.EMAIL_FROM, [email])
        # 发送邮件异步，函数见第六章
        # EmailThread(email_title, email_body, settings.EMAIL_FROM, [data["email"]], fail_silently=False, html=None).start()
        if not send_status:
            return False
    return True
import time
import threading
from django.core.mail import EmailMultiAlternatives

class EmailThread(threading.Thread):
    def __init__(self, subject, body, from_email, recipient_list, fail_silently, html):
        self.subject = subject
        self.body = body
        self.recipient_list = recipient_list
        self.from_email = from_email
        self.fail_silently = fail_silently
        self.html = html
        threading.Thread.__init__(self)

    def run(self):
        # time.sleep(10)
        msg = EmailMultiAlternatives(self.subject, self.body, self.from_email, self.recipient_list)
        if self.html:
            msg.attach_alternative(self.html, "text/html")
        msg.send(self.fail_silently)
